Enameled condenser



Jan. l, 1935. MI RESEK ETAL 1,985,950

y ENAMELED CONDENSER Filed March 7, 1932 4 Sheets-Sheet l I Q v l l I I I I Jan. 1, 1935. M. Rr-:sEK ET Al. 1,985,950

ENAMELED CONDENSER Filed March 7, 1932 4 Sheetsheei, 2

Jan, 1,` 1935.

M. RESEK ET Al. ENAMELED GNDENSER Filed March 7, 1932 4 Sheets-Sheet 31a/venice; @vm W q1 Patented'Jan. 1, 1935 .Appieati'onliyiaiehng isz, Yserial No. semio- K l isolants; (cirzsvzzsr In the constructionnof"` Src-4 lli frigerators `it .is 4highly desirable to ni'sh-many' oftheparts in vitreous enamelf,"'not'-alonelfor the sake of appearance and hygiene-"butl because of the protective virtue of this .kind of :surface coating. For example, the condensertank; constructed 'of lsheet iron or steeljin the/interest of economy, may be `enameled inside as well as out for the purpose`fof' fcrtifying :the Imetal againstthe corrosive effects of the vwaterior other cooling solution;` and, fori the samerreasonpthe condenser' coil or [circulating 'unit-ewhichis desirably `made of steel vbecause. thi's-metal1. is

ybest suited to hold .the'commonlygusedfrefrigerant, ammonia-may rbe coated on` its ,exterior f withk vitreous enamel.A f n In the iinal construction y of the .'czond'enser, the Y coil or circulating unit is, of course, situated vlith-v in .the v tank with its :terminals 1 extended through the wall thereof with'aleakprocf'jointrsuch joint being preferably effected by welding-asthis'inakes a mechanically strong las dwellfas-a permanently fluid-tightr connection. Itis found" to fbemeither practical 'nor expedient, however,v to` assemble the tank and *circulating kunit before ena-melingthem because ofthe fact that. it isl-practically1impos sible to properlyinspect" the Work and make sure that every bit of the' surface iscovered Anexposure i of` the slightest l area ,of metalfyvould render the entire structure unt for service :ogy

Itis the primary purpose of four inventionto provide a construction, and a method ofiproduc-k ing the same, which aiord the -advantagesofallowingvthe tank and coilor circulating unitto be separately enameled andlinspected .and then assembled with each terminal -ofV the coilor circulating unit extended` through anopeningtin f a wall of the tank and connected theretowith a mechanically strong.. and huid-tight erably'effected bynweld-ing. A

To facilitateV the` assembling of: the parts and to'promote good appearance ofthe nished prod@y uct the invention advocates extending theterminals of theV `coil or circulating.unit'rgthrough the bottom ofthe tankw 'Ifoi savoid, 4when the outfit is in fuse, undulyf'heating, the Water-fior other' cooling vsolution in vthe condenser tank :by the l:high temperature of 'thef vaporsldelivered joint, preffrom the generator tothe condenser, our` invene..

tion has, as a further object, theproyisionof means for insulating that portionlof-ftheifvapor conduit extending from the'pointat whichit enters the -tank to Whereit isdesi ed'thatits Other andmore general objectsare toprovide arelatively simple *and` inexpensive', yet highly efficient method 'and construction through whichr theV previously mentioned advantages are -attained and which expedite andzcheapen manufacture.; y n 1;' L 1 i vIn the accompanying drawings, wherein like reference characters designate corresponding parts throughout ytheseverabviews; Fig .1 is ay sectional vfront'elevation of'a condenser constructedvin accordance `with theinvention;`Fig.

2 is a planvieW-'offthe same; Figs. 3,1,4`andg5 are sectionalv,detailsgon a scale somewhatenlarged over that-of the previous views,i;on therespective'linesB-v-B, 4 4 and 5.-`5fof Fig. 2;,Figs. 6

and 7 are views. similar to' Fig. -3of modica ltions of the invention, and Fig. 8 is afsection onthe line 8`8 of'Fig'. '7. t kg The tank, which isdesignated generally bythe reference numeral 1,- is Vshown as rectangular lin plane and as drawn from sheet Ametal with the l upper edge. of its peripheralwall curled inwardly and-over,asshown at 2 ,;so as to presenta smoothvupwardly Afacing curved rim.A Extending diagonally across each cornerof the tank adj a. centits :upper edge a bracket 5y Whose `ends are turnedupwardly andare welded at 6 Vto the inrWardly curled `edge of the peripheral wall., .The bottom. of the tank is designated? and adjacent. one side is-provided with an opening 8 (Fig. 2*)v that is surrounded by a depending angeS.` Legs l0 are vwelded or otherwise secured tothe corners ofthe tank. 3 Y y Y' l2 is the circulatingunit orcoil, and itsinlet and outlet ends or terminalsare designatedl i and 14, respectively. The -unit or coil 12is adapt-r ed to besupported in proper-positionfwithin the tank, with `its terminals M13' and A14 extending kthrough theopening 8 in thebottom 7, by hangers1 5 that are welded or otherwisesecured'to the upper Iportion of the unit l2' and extendiipward lyand outwardly therefrom -fnd- Ahave yhorizontal extremitiesthat .overlie the centralportionsA of vthe brackets 2 5.' Bolts 16-are extended upwardly yable material being interposed -between'the hangers raiid.brackets.` l y l A 4sleeve; 2,0;surrounds and is spaced radially,` outWjardlyfl from-the inlet end or yterrninalof ,the

coil or circulating unit-l2f and at its upperfend jointfi's `ma e atezljas by welding, ;1between the contracted -iend''ofv the vsleeve and the coil for unit.

is contracted vto:rit-.about the saine, f Aliquid-tight A plate 22, that is designed to t within the flanged opening 8 of the bottom '1, has an aperture through which the outlet terminal 14 extends, and a larger opening within which is engaged the lower end of the sleeve 20. The plate is secured to the sleeve and aforesaid terminal 14.by welding, and a similar. connection is made between the periphery of the plate 22 andthe' edge of the flange 9.

A cover 25 is applied to the top of the tank and I.

The tank 1 is coated inside and out with vitre- 1 ous enamel, and the circulating unit or coil 12 is similarly-coated on"its"exterior,the coating extending over vthe outer` side of the vsleeve '20'. In the larger detailrviews' (Figs. 3 to'8) the enamel coatings are designated E. As will be noted by reference to Figs. 3, 4 and 5, the enamel coating stops shortof thelower edge of the ange 9 and of the corresponding edge of the sleeve 20 and terminates' above the plane of said plate on the outlet end or terminal 14 of the coil or circulating unit. This is to permitthe welding of the plate 22 to said parts,l as above described. To protect the exposed metal of the flange 9, sleeve 20 and unit1'2, as well as'the inside-surface of the plate 22,'from thei'contents of the'tank, a'depositv28 of a suitable substance, suchas an asphaltum compound known'as Hydrolene, is placed within the basin effectedby'the iiangef9- and plate'22f.

According to the present-preferred procedure under lour improvedinethod of producing the abovedescribed condenser, the unit constituting the tank, andthe vcoil or circulating unit, are separatelyf coated with vitreous enamel and the enamel is'wipedv off of the lower edge of the flange 9 and the corresponding end of thesleeve 20y and is similarly removed from the end orterminal 14 of the unit 12 to about the plane of the wiped portion ofthe sleeve. The enamel coating on both units is then baked in the usual ywayand thereafter the plate 22 is welded to the lower end o f the sleeve`-20 and to the terminal 14. Next, the coil or circulating unit 12 is placed within the tankfand the terminals 13 and 14 are projected through the opening 8 in the bottom 'l so that the plate 22 is disposed across said opening. 4The parts are then adjusted until the underneath surface of the plate 22l is substantially ush with the edge ofthe flange 9, when said plate and liange are connected together by welding.

In the modification kof the invention illustrat ed inl'igli, the flange 9u of the bottom 7 is made deeper thanthe corresponding flange of the pre# viouslydescribed forni and-intermediate its upper and lower edges ies/'provided with an linwardly facing groove., Theplate 22 is connected Lto the ter-'- minal14 of the unit 12 and to the lower endof the sleeve 20, as inthe previous case, and its peripheral portion lis welded to the lower edge of the iiange 9a. VTo protect the exposed metal of the parts within the bottom of the basin formed by the plate 22 and the flange 9, sadbasin`is filled to above the plane of the grooveof the iiange 9a with a body-29 of type metal or the like, such material being selected and poured when hot :for the reason thatihitexpands whencooled thereby to tighten itself within the embrace of the ilange.

about its'ed'ge, and to its under side is secured, as

:by screws 32, an annulus 33. The portion of the plate 31- of reduced diameter is adapted to be extended y.through an opening in the bottom 'I of Ithe tank 1 and the 'same is considerably less in diameter than said opening. A channel-shaped gasket 35, of suitable packing material, embraces the portion of said bottom 7 about the aforesaid opening Iand occupies the rabbet of the plate 31 within which it is compressed by the annulus 33 thereby to effect a uidtight joint between the wall of the tank and the plate 31. Enamel coatings-'are' shown, on vthe one hand, as encasing the Aportions of the unit 12 and plate 31 that are withinv the tank and as extending entirely about the. portions of the bottom 7 surrounding the opening therein.

'As may be supposed from what has previously beensaid, thepurpose of the insulating sleeve 20 is to protect the contents of the tank 1 from the high temperature of the vapors as they are deliveredto .the condenser from the generator. It'- is, .of course, `essential that an intimate heat exchanging relation exist between said vapors and the cooling agent in the tank from a certain point onward, so ras, to rst dehydrate and then condense the refrigerant vapors; but it would reduce the eiliciency of the condenser qutematerially if thev cooling agent were subjected to the heating influence 'of the vapors from the point at which the vapor delivery conduit enters the tank.

This will be vbetter understood when it is explained that the upper'portion of the circulating unitor coil serves as a dehydrator and pre-cooler, and that the lower portion acts as the condenser. For greater efficiency, a stratification of the body of cooling liquid or water is essential, the cooler portion being fat'the bottom of the tank and the warmer at A'the top. This causesthe refrigerant vapors as they pass through the circulating unit to be Adehydrated and pre-cooled and then condensed, the-latter beingperformed atV a lower temperature and consequently a lower pressure thany would be the case if the temperature throughout the tank were the same.- An advantage of condensing at a lower pressure is that less time is required to start the subsequent refrigeration yperiod as the pressure diierential between the condensing and evaporating phases is then less to overcome.` I

By insulating the inlet end 'of the circulating unit or coil for some distance above lthe bottom wall of the tank in the manner already described, it is'i'evident that the desired stratification of the bodyk of' cooling liquid or water is effected; The heat'of "the incoming vapors cannot be imparted to the lower portion of the body of liquid, and before vthel vapors reach the condensing portion of l the circulating unit or coil they will have given up much of `their heat so as not to materially affect the-temperature of the cooler portion of the body'of liquid. While'the terms enamel and vitreous enamel arer u sed throughout the description and the claimsvto describe the surface coating on the tank and on the circulating unit or coil, it is to be understood that any equivalent material-that is,

c eterne Pe-.abge

m s intended to be embrace SMSI misi; f 'g tnii's ydescribeuour invention, whatwe meer. t

braced within the rank ,l n u .2; A @denser ef the .character deeribed tmfiS'iheek. Hring an spcifi; ,fnl 10.11, .QI vits 'telltti 'ieek,beiiei1inil @Oat-d eager gie 'about the edge lof Vsaid opening, a circulating unit vithin the 'tank having a portion exten ng strenge "e garer-essie Giesemann ma beine tdfkepnagtne portion inepposed @geeignete fg Heure intended to 'be unit andfhaving its peripheral lportiona similarly jinr'd 't' th fw llfo'f thetank surroundingthe opening theri'gand fa deposit "f material ar-V ranged to shield saidmernber, in the zone-of its connevctionsiw'ith'Lthe'tank and unit, 'fromthe contents :of fthe tank.-v

3. A condenser of the character described comprising a tank having `an opening in one of its walls surrounded by a flange, the tank being coated with enamel excepting adjacent the edge of Vsaid ilange, a circulating unit within the tank having a portion extending through said opening, the unit being coated with enamel excepting the portionvthat is opposed to the edge of said flange, a `plate welded to'said portion of the .irculatin'g unit and having its periphery similarly joined to the edge of the flange so as to eiect a fluid-tight connection with both the tank and circulating unit, and a body of material enclosed by said flange for protecting the plate, in the zone of its connections vwith the tank and unit, from the contents of the tank.

4. A condenser of the character described comprising a tank having an opening in itsy bottom wall surrounded by a depending flange, the tank being enamel coated excepting adjacent the edge of said flange, a circulating unit situated within ther tank with its inlet and outlet terminals extending throughsaid opening, a member closing said opening and surrounding and welded to the terminals of the circulating unit, the edge portion of said member being .weldedto the edge of the aforesaid flange, and a deposit of protective material within the enclosure of the aforesaid flange, the portion of the circulating unit that is exposed to the contents of the tankV being coated with enamel. y

5. A condenser of the character described comprising a tank having an opening in its bottom wall that is surrounded by a depending flange, the tank beingr coated with enamel ex-r cepting adjacent the edge of said'ilange, a circulating unit situated within thetank and hav- 1 ing its inlet and outlet terminals extending through said opening, a sleeve surrounding and spaced radially outwardly from the inlet terminal of said unit and extending from the region of said flange into the tank to a point remote ine terminaisgof Athe circula ing un Jectv to the sl'eve surrounding the inlet terminal;` the peripheral portion of` the`-plate `being "similarly i" posit brpiotective 'mate alwit inthe enclosure f plat'e', Ythe por-7'.

a the nassen 7. fn 'toneel-ieee ef te @unserereesenbedeea:

vlensing an enamel coated tank having an apen t'urd depression in one of its walls, andan enamel coated circulating 1inrit[within th tank 'havinga portion projecting 'thoigh the aperture essaie estres the 'parte of the tank 'unit` inrfthe region of Y'the' 'aperture being devoid'o'f @ameland welded tegetneig'ahd a ina l Wall that is provided with apertures, a circulating unit situated within they tank and having its in-V let and outlet terminals extending throughsaid apertures and Vwelded to the tank in the region thereof, the tank and circulating unitfbeing enamel coated excepting where welded togethere and a deposit of protective material within the depression and covering the Welded parts and the tank and circulating unit.

9. A condenser of the character described'corm l l prising a tank having an opening in its bottom Wall and provided with brackets adjacent its and having aportion extending through the laforesaid opening, means for connecting said portion to the vsurrounding part of the bottom wall with a fluid-tight joint, Vthe circulating,`

unit being provided with hangers Aoverlying said brackets, and means for connecting said hangers f `to the. brackets, v

1G. A condenser of the character describe comprising an open top tank having a hole in its.

bottom wall, brackets adjacent the open top of the tank, a circulating unit situated Within thel -top,`a circulating unit situatedwithin the tank tank with its terminals extending through the hole in the bottom -Wallthereofy said unit being i `provided with hangers ,overlying-the aforesaid brackets, means for securing theihangers to the brackets, and means effecting a`uid-tight joint between the terminals ofthe circulating unit and the portion of the bottomwall of the tank s urv Y ,y 65

ll. A condenser of the character described` rounding said hole;

comprising an open toptank having a holein its bottom wall, brackets adjacent the top `of the tank,` acirculating unit situated within the tank with its terminals rextending through the hole in the'oottom wall thereof, lmeans for.` effectinga luid-tightfjoint between `said terminals and the A portion -ofjthe bottom Wall surroundinggsaid hole,v

the circulating unit having Vhangers overlying the aforesaid brackets,` bolts extending upwardly ,13. A i condenser for artificial refrigerators comprising atank, a circulating unit withinthe tank having its inlet terminalextending through the bottom portionof the tank, andan insulating sleeve surrounding the inlet end portion of said unit within the tank.

14. A condenser for artificial refrigerators comprising a tank and avcirculating unit Within the tank having its inlet end extending through the bottom Wall of the tank, and an insulating sleeve surrounding and spaced from the inlet end portion of the circulating unit and extending from the bottom Wall of the tank along said unit to a point remote from said Wall.

15. A condenser for artificial refrigerators comprising a tank, a circulating unit within the tank whose inlet terminal extends through a wall thereof, andmeans for insulating the inlet end portion ofthe circulating unit from the contents of the -tank for a distance inwardly of said Wall.

16. A condenser for artificial refrigerators comprising a tank, a circulating unit consisting the tank and having its inlet terminal extending through the bottom of the tank, and insulating means surrounding the inlet terminalof said unit n Within' the tank substantially throughout the height of the condensing portion of the circulating unit. i Y Y 17. A condenser4 for artificial refrigerators comprising a tankand a circulating unit consisting of an upper dehydrating portion and a lower condensing portion situated Within the tank and having its inlet end extending through the bottom Wall of the tank, and an insulating sleeve surrounding and spaced from the inlet end portion of the circulating unit and extending from the bottom wall of the tank along said unit throughout the height of the condensing portion thereof.

18. A condenser of the character described comprisingV an enamel coated tank having an opening in one of its walls, an enamel coated circulating unit within thetank having a portion extending through said opening, said portion of the unit and the portion of the tank surrounding the aforesaid opening being devoid of enamel for joining purposes, a lfused uid-tight joint between said portion, and material covering said joint that is imperviousto the cooling liquid intended to be placedvvithin the tank.

ivniRcv RESEK.' THEoDoRE B. FoCKE. 

